University of Queensland

About: University of Queensland is a education organization based out in Brisbane, Queensland, Australia. It is known for research contribution in the topics: Population & Poison control. The organization has 51138 authors who have published 155721 publications receiving 5717659 citations. The organization is also known as: UQ & The University of Queensland.

Ammonium Production in Soil under Waterlogged Conditions as an Index of Nitrogen Availability

Abstract: MANY methods of obtaining an index of the availability of soil nitrogen to plants have been proposed, but it is generally accepted that the most satisfactory methods currently available are those involving estimation of the mineral nitrogen formed when soil is incubated under conditions which promote mineralization of the organic forms of soil nitrogen by soil micro-organisms1,2 Numerous incubation techniques have been used for estimation of mineralizable soil nitrogen, but methods involving determination of the nitrate produced by incubation under aerobic conditions at 28°–35° C for 2–4 weeks have been generally preferred2 However, recent work has shown that these nitrate-product ion methods are open to serious criticisms, and that the total mineral nitrogen produced during incubation should be determined2 Also, the use of aerobic incubation techniques is complicated by problems in establishment and maintenance of satisfactory conditions of incubation1,2 In an attempt to eliminate these problems and to develop an incubation method of estimating mineralizable nitrogen that is suitable for routine analysis of soils, we have investigated the possibility that methods involving estimation of the ammonium produced by incubation of soil under waterlogged conditions may provide an index of nitrogen availability This investigation led to development of the following method of assessing mineralizable soil nitrogen:

The eukaryotic genome as an RNA machine

Abstract: The past few years have revealed that the genomes of all studied eukaryotes are almost entirely transcribed, generating an enormous number of non-protein-coding RNAs (ncRNAs). In parallel, it is increasingly evident that many of these RNAs have regulatory functions. Here, we highlight recent advances that illustrate the diversity of ncRNA control of genome dynamics, cell biology, and developmental programming.

Infrared Patch-Image Model for Small Target Detection in a Single Image

Abstract: The robust detection of small targets is one of the key techniques in infrared search and tracking applications. A novel small target detection method in a single infrared image is proposed in this paper. Initially, the traditional infrared image model is generalized to a new infrared patch-image model using local patch construction. Then, because of the non-local self-correlation property of the infrared background image, based on the new model small target detection is formulated as an optimization problem of recovering low-rank and sparse matrices, which is effectively solved using stable principle component pursuit. Finally, a simple adaptive segmentation method is used to segment the target image and the segmentation result can be refined by post-processing. Extensive synthetic and real data experiments show that under different clutter backgrounds the proposed method not only works more stably for different target sizes and signal-to-clutter ratio values, but also has better detection performance compared with conventional baseline methods.